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etep

178 karma · joined June 10, 2013

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etep··on Train vs. Airplane Energy Efficiency (2010)
Yes, I would not dispute your statement, but that does not contradict the fact that airframe weight is minimized to increase efficiency. I did notice the seats were mostly metal, but I also noticed their (essentially) honeycombed design: they are mostly the rigid frame, rather than solid metal. I'm sure if they could reasonably remove the ram air turbine, they absolutely would (both for cost and efficiency).
etep··on Train vs. Airplane Energy Efficiency (2010)
Thank you. I didn't know about that requirement; and it would obviously be ridiculous to stipulate that airframes be made heavy.
etep··on Train vs. Airplane Energy Efficiency (2010)
It isn't clear that electric is a lower carbon footprint, right? What if the electricity is generated at a coal plant?

Intuitively the train should be more efficient, right? So the question imo is why does the data say otherwise: Is there less market pressure to make efficient trains? Is this data wrong? Is this intuition wrong?

(edit to include questioning the intuition itself, i.e. based on the reply comment)

etep··on SVG Mask Artwork of the Intel 4004
You are focusing on the emotive aspect of traditional art and I am focusing on the creative aspect of what is traditionally considered merely technical. I am pushing back on the merely, but I doubt you'll agree in the end.

If I had to guess, you don't like the Poignant Guide to Ruby: http://poignant.guide

Why is there such enthusiasm for this? If it were only about solving puzzles with clinical detachment, I doubt the guide would have gained its following. Perhaps this book is a work of art meant to convey a fascination with a purely technical subject -- but why is this so successful, when the traditional routes toward the same, namely a degree in CS taught by like minded faculty, fail in some scenarios. In my view, the reductive stance that there is no art in these disciplines, is holding us back (i.e. diminishing our culture, and hindering recruitment).

Your point about purpose is well taken, and I get that. I disagree about how easy it is to score the results, and there is some inherent inconsistency when you can simultaneously refer to elegant engineering and objectively measurable best possible solution, i.e. in the latter, elegance is not a criteria, i.e. unless you make it one, it which case the contradiction is self evident. But again, this isn't going to persuade you, however, if you want to refine your position, perhaps you omit the reference to elegance :)

Thank you, btw, for your comment.

etep··on SVG Mask Artwork of the Intel 4004
It is interesting and important that we refer to these masks as "artwork." Many of these older designs also have "signatures" etched into the silicon.

I claim that this notion extends to code, as well, and rightly into many other engineering and scientific projects (I suspect the pure math community might agree, i.e. by my reading of how they view their own discipline).

As an informal definition of art, I offer creativity within some bounds, i.e. the rules of the medium. Often, the tighter the bounds, the higher we elevate the end result (e.g. the most praised sonnet, or work of classical music). Here the bounds are pretty constrained: bug free, implements the ISA, manufacturable, and competitive and profitable.

As with many here, I am frustrated with my work when it is reduced to "turning the crank," but I suspect many writers (e.g. your Reuter's journalist) feel the same; and of course, we could introduce other examples from other disciplines. If working on a ground breaking project, then I can focus on that and derive some satisfaction from my contribution to that end.

Finally, my point: I submit these masks as evidence of the artificial dichotomy between the liberal arts and engineering disciplines. There should be more acknowledgement of the art produced on both sides of this divide, and more crossing the aisle (so-to-speak) from the thought leaders in this debate. Of course we need to train our next generation to work with these machines, and of course we should not kick the traditional liberal arts out of the curriculum. Sheesh. But I really would like some push back that claims our ground, i.e. technical achievement of this kind as art.

etep··on Sift: Grep on steroids
Did you drop caches in between tests (or alternately, did you warm up the cache for both)?
etep··on Gobble (YC W14) Raises $10.75M for Its 10-Minute Dinner Kits
I think a better comparison is the planning it would take to get to the variety that Gobble offers. I've been on that rotating meal plan and it is pretty narrow in my experience. Every once in a while I find a new recipe, euphoria ensues, and then I spend two hours going to whole foods and trader joes - lesson learned, don't do that!

I don't think it is you and I appreciate the honest comment, but from the other comments it seems that everyone here has mastered the art of fitting in the planning, shopping, prep, cooking, and cleaning. Truly amazing! Or simply surprising that they can't hypothesize about the poor folk like myself who just can't quite get there in their life.

etep··on Gobble (YC W14) Raises $10.75M for Its 10-Minute Dinner Kits
To me, the highest cost of cooking for myself is planning and shopping. The value, therefore, is to offload the thinking, planning, and shopping part of this. The prep and cleanup is actually fun and easy to fit into my schedule. Therefore, solid value prop and great idea.

Further, imo, the cost and packaging "waste" is nothing significant. When I shop for myself I still get packaging. Worse yet, a lot of food gets wasted anyway, i.e. because the grocery store doesn't sell me exactly as much food as I need, whereas Gobble does. I suspect this is actually more efficient, i.e. on all frontiers, especially given the waste I always generate from shopping for these ingredients.

etep··on Oklahoma Earthquakes Are a National Security Threat
For those interested in more on the topic of the earthquakes: http://www.newyorker.com/magazine/2015/04/13/weather-undergr...
etep··on CIA Director John Brennan emails
young people - old people = lord of the flies
etep··on Live Now: Stephen Wolfram LiveCoding
I second that, you beat me to it.
etep··on The revival of sensory deprivation tanks (2014)
Waiting for someone to write the article that includes a reference to Tom Clancy's "The Cardinal of the Kremlin" -- a great read; that was Clancy at his peak.
etep··on What is Electricity?
I disagree with the nitpick. Electricity is not a technical term. In its common usage, it encompasses many effects and broadly invokes many technical concepts, i.e. among them EMF or voltage, current, electromagnetic waves, etc. etc.

This article is not written for physicists, engineers, or anyone else so technically trained. If it were, it would read as follows: "Electricity is a vague term used to variously refer to the many aspects of electromagnetic phenomena."

If you want to keep that sentence, and cover your bases, you could reword as "the flow of electric charge, the potential to cause the same." And in any case, the escape clause already exists as "there’s so much behind that simple statement."

etep··on Theranos Dials Back Lab Tests at FDA’s Behest
Thank you for linking this through google.
etep··on [dead]
Please post a "how to compile on mac" tutorial.

I'm stuck waiting for an "invite" despite that I got the email announcement.

etep··on The Other Cray Launches CPU-FPGA Hybrids
It doesn't make much sense to say that Intel can't build something better than a GPU, right? It's like saying the reason nvidia doesn't build CPUs is because they can't build a better CPU than Intel. It distracts the conversation.

So the question really is, what is the long term strategy and why? It appears to me that Intel has validated some of this "custom hardware" FPGA strategy and that their view is it will be "better together."

I agree that Intel is erecting roadblocks, but I doubt it is because they "can't build a GPU," rather more likely because "they can erect roadblocks." In fact, they are obligated, by their shareholders, to erect those roadblocks (or to play dirty if you want).

etep··on The Other Cray Launches CPU-FPGA Hybrids
Intel has an interesting angle on this: FPGA + Xeon.

One story I see here as similar to what has been happening to the GPU business: Intel controls the access to the CPU, and therefore they will have an advantage because they can hold the competing solutions at arms length over PCI.

The link is just the first result I got back from Google, but, for example, 20x perf upside claimed: http://www.extremetech.com/extreme/184828-intel-unveils-new-...

The other takeaway, for me anyway, is that these are interesting times because hw architecture and hw/sw co-optimization appear to be gaining in importance (i.e. because Moore's law is slowing).

etep··on Volkswagen’s Diesel Fraud Makes Critic of Secret Code a Prophet
Great question. I've seen companies with entire teams dedicated to dissecting the performance claims of the competition, and then running their own tests to verify and/or debunk the same. Keeps everyone honest, and it prods along the in-house engineering effort. Why didn't the other automakers see this?
etep··on Elephants Shot with Poison Arrows Travel to Humans for Help
Digging in to this by searching for other related stories, in brief, my findings:

1. So far, no direct corroboration. Not even on the DSWT website. 2. Poachers do appear to use poison arrows/darts. 3. DSWT appears to be the real deal, i.e. not a phony wildlife sanctuary.

I buy it that the elephants would go there. I'd like to see a better write up. Agreed that the article, as such, is a bit weak.

etep··on An Intuitive Explanation of Fourier Theory
From the first section, basic principles:

"any signal" huh? "spatial frequency" 2x huh? "a "DC term" corresponding to zero frequency" #seriously

This is intuitive only if you already know this stuff, which I happen to, but I have also tried to explain this to undergrads taking history and english. Terms like these are not intuitive at all.

etep··on Gaps in Alumni Earnings Stand Out in Release of College Data
I was thinking the opposite: finally a .gov website that looks good and is easy to use. Who cares if their exact design choices aren't your particular favorite. This page is much better than the average IRS web page. So the real question is: why can't the .gov web pages that really matter get up to speed?
etep··on Recollections of Early Chip Development at Intel (2001) [pdf]
Figure 3, hand drawn cell layout on Mylar. Nice.

Design automation begins: By 1974, the result was being digitized on a Calma GDS I

etep··on Counting hash collisions with the birthday paradox
I've faced similar questions and the work of Michael Mitzenmacher (at Harvard) has proved very valuable (e.g. modeling table load for d-left).
etep··on Hagoromo president explains why he closed down his beloved chalk business
Not awkward, the sentence you call out. Beautiful, rather, and whether it is an artifact of translation or not, no matter. You didn't mean awkward in a pejorative sense; this is just an affirmation.
etep··on Why is processing a sorted array faster than an unsorted array?
For completeness, a) make the array very big (much much bigger than the LLC) b) split the work amongst cores (make it parallel with your favorite methodology)
etep··on Show HN: StatisticalAtlas.com: demographic charts and maps down to the city block
ok, it's in the San Jose area.
etep··on Show HN: StatisticalAtlas.com: demographic charts and maps down to the city block
Can't find Palo Alto...
etep··on Abandon your DVCS and return to sanity
This: Git is so amazingly simple to use that APress, a single publisher, needs to have three different books on how to use it. It’s so simple that Atlassian and GitHub both felt a need to write their own online tutorials to try to clarify the main Git tutorial on the actual Git website.
etep··on Thanks for the Memories: Identifying Malware from a Memory Capture
Where does the memory capture come from?
etep··on Understanding Linux CPU stats
I would like to see stats beyond those provided by top. For example, memory bandwidth (broken into read and write bandwidth). IO bandwidth. CPU cache hit rates. Instructions per cycle. Energy consumption. AFAIK there is no really nice way to see all the true under the hood perf stats. Yes I know about perf, LIKWID, and other similar tools -- point being, I think there is an opportunity to put this kind of monitoring into a tool at the level of scout and truly have something informative.
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